Jung Sung-jae (born October 1967) is a South Korean entrepreneur and former dermatologist. He is the founder and former chief executive officer of Classys, a medical aesthetics device manufacturer, and a co-creator of Dr. Jart+.[1][2] Forbes estimated his net worth at US$760 million in 2025.[3]
Jung Sung-jae was born in October 1967.[4] He attended Hanyang University,[5] where he earned a bachelor's and master's degree in medicine.
In 2002, he began serving as the director of Soft Touch Dermatology Clinic (소프터치 피부과).[7]
In 2007, while still working as a dermatologist, Jung founded Classys.[8] The company began to develop medical devices, with a focus on skin care.[7]
In 2017, Classys went public on the KOSDAQ.[7]
In 2022, Bain Capital Private Equity acquired a 60.84% stake in Classys for 670 billion Korean won.[9] Jung and his family collectively sold their majority stake while retaining approximately 12.93% ownership in the company.[6][10]
